FxMed are proud to exclusively partner with SIBOtest.nz (owned by Sharon Erdrich). SIBOtest.nz are the only specialist SIBO testing service in NZ and the only lab to offer the convenience of an at home test kit. The SIBO breath test is now also available through us making it easier for you to access.

The SIBO test is a simple, non-invasive breath test that is used to diagnose SIBO. Knowing the type and level of gases produced aids targeted treatment and forms a base line for follow up comparison.

How does the SIBO test work?

A restricted diet is required for 24 hours in preparation.

Following a collection of a baseline breath sample, either a lactulose (or glucose) test substrate is consumed.

The bacteria may ferment the lingering substrate and produce hydrogen and/or methane. These gases are absorbed into the bloodstream and exhaled through the breath.

Breath samples are collected every 15-20 minutes (depending on the substrate used) for up to 3 hours and analysed for the amount of Hydrogen, Methane and CO2 produced.

This test can be done at home and samples sent to SIBOTest.nz for analysis.

What is SIBO?

Normally, bacteria are found in the trillions in the large intestine, where they perform various functions for the human body. SIBO is defined as an increase in the number of bacteria, and/or changes in the types of bacteria present in the small intestine. In most patients, SIBO is not caused by a single type of bacteria, but an overgrowth of the bacteria that should normally be found in the colon.

Prevalence estimates are based on a percentage of the population with Irritable Bowel Syndrome (IBS). This is 11-14% of the population globally and 17% in New Zealand. It is the most common gastrointestinal diagnosis in primary care although it is thought that up to 50% of people with symptoms of IBS do not consult their GP. Studies also show that over 50% of patients diagnosed with IBS actually have SIBO.

Common symptoms of SIBO

Postprandial bloating/abdominal distension with associated discomfort

Gas and belching

Food Intolerances

Constipation (generally associated with methanogenic bacteria)

Diarrhoea (generally associated with hydrogenic bacteria)

Immune activation (e.g. food sensitivities)

Nutrient deficiencies i.e. vitamin B12 & Iron

Weight loss / weight gain

Fatigue or brain fog

Fibromyalgia

SIBO Effects

SIBO has been shown to negatively affect both the structure and function of the small bowel. It may significantly interfere with digestion of food and absorption of nutrients, primarily by damaging the cells lining the small bowel (the mucosa).

Bacterial endotoxins and Lipopolysaccarides (LPS) can have wide ranging effects systemically. Additionally, this damage to the small bowel mucosa can lead to impaired gut permeability which is known to have a number of potential complications including immune reactions that cause food allergies or sensitivities, generalized inflammation, and autoimmune diseases.

There are two main types of bacteria present in SIBO:

Please note: This is an American instructional video however, the process of doing the test is the same as the NZ SIBOtest. Not all tests that are shown are available and the paperwork will be different, however, your practitioner will be able to answer any queries you may have.

Browse range of SIBO Tests available:

Lactulose

Is the preferred substrate as it is not absorbed by humans and takes up to 2 hours to traverse the small intestine. This gives us a picture of what is happening throughout the entire small Intestine, as well as upon arrival in the colon.

Only bacteria, not humans, produce the enzymes to digest lactulose. Therefore, if there is a bacterial overgrowth, increases of Hydrogen and/or Methane gas after consumption of lactulose are indicative of SIBO.

Is recommended unless the patient has a true milk allergy (eg severe reaction from minute amounts/anaphylaxis), as there is a miniscule amount of lactose in lactulose. In this case a glucose challenge test is indicated.

Patients who experience Distal SIBO symptoms, ie pain in the right lower abdomen are recommended to do a Lactulose (rather than glucose) test.

Glucose

Is highly specific for Proximal SIBO because of its rapid absorption in the first part of the small intestine.

Symptoms that occur within an hour of eating are suggestive of proximal SIBO, especially after consuming refined carbohydrates, sucrose, fructose and lactose. However, other nutrients such as some fats and/or protein may also trigger this response.

Both humans and bacteria absorb glucose. This happens in the upper part of the small intestine, which (in a healthy gut) is close to sterile, therefore if Hydrogen and/or Methane gas are produced during this test, it reflects bacterial activity – the degree and type of overgrowth is reflected in the amount and type of gas produced.

Because of its rapid absorption in the proximal small intestine, it fails to identify distal SIBO.
If glucose testing is negative, a lactulose test is recommended to test for distal SIBO.

PRACTITIONER REFERRALS ONLY

Please note that all products and services found on this website are available to patients through their health practitioner only.

We also provide a referral service for no-charge to patients all over the country. To find a health practitioner in your area, please contact us by email, phone or fax and let us know where you are located.

Our Customer Services Team will then get back to you with contact details for health practitioner/s nearest to you.